Wonderful coral islands exist among crystal clear ocean waters, far from noisy, hectic cities, but don't let the calm seas fool you. Beneath the waters of a peaceful lagoon, fish, mollusks, and exotic sea animals are sovereign masters. A ferocious shark, cautiously fears a tiny and weak sea urchin, which can be his deadly enemy. The proud and lurking killer whale can soar over the reef in one stroke, while the weak but nimble octopus vanishes into the reef, then impetuously rushes forward - to attack! The electric stingray, on the spur of the moment, kills anyone around.

All these creatures of the deep have gathered together, to play a fateful part, in the last fight. Try your strategy skills and lead one of the sea armies in battle in a duel to the end. It's a pleasure to play this underwater board game that is as complex and fascinating as chess. But to win the game is to gain double pleasure, because the opponent is the deadly enemy of artificial intelligence.